Hello,
I am currently building my Network using Mikrotik Hardware. The Switch is already running, now I want to do WiFi. All Infos I find online is that for the channel, there should be a b/g/n option, all in one. But I only have a single one AX, B, G, N. Does that mean for a b/g/n channel config I need to configure 3 separete WiFis?
Thank you for your help!
I believe AX covers all, in other words it defaults and covers off whatever signal comes in and is thus equivalent to ALL
Not really sure, but I also believe that whatever signal is processed then that is the lowest commen denominator.
AKA if our processing B, then all other connections after will connect at B speeds only, but not sure.
Yes, the one which is in common between any two points, not affecting communication with other points.
That is, each attached device agrees with the AP their security options and WiFi protocols (4,5,6,7) independently, on a given channel.
That at least is my reading of it. Certainly AX devices are downward-compatible, adopting whatever the other end can achieve.
Nope. Each station can have it’s own processing (one B, one AX, at “near” same time). It’s similar to rate adaptation: one station might be far from AP and AP has to use lower MCS to provide reliable link. At the “same time” (actually at the different time, AP can only transmit to single station unless MU-MIMO is used) AP can use higher MCS for transmissions to a close station.
What B/G/N … mean is lowest speed (in wireless driver it was called “basic rates”) used for broadcasts … so it’s possible to set basic-rates-a/g=12Mbps,18Mbps supported-rates-a/g=12Mbps,18Mbps,24Mbps,36Mbps,48Mbps,54Mbps which means that any communication from AP towards clients (broadcasts and unicasts) will use at least 12Mbps radio rate. Effectively preventing B devices to connect to such AP.
And in new wifi drivers it’s not possible to restrict minimum speeds (making B devices happy again … if they can live with wpa3 and ft 
).